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# modification, are permitted provided that the following conditions
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#    from this software without specific prior written permission.
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***************************************************************************/
#include "stdafx.h"
#include "BaseGraphicsPass.h"

namespace Falcor
{
    BaseGraphicsPass::BaseGraphicsPass(const Program::Desc& progDesc, const Program::DefineList& programDefines)
    {
        auto pProg = GraphicsProgram::create(progDesc, programDefines);
        if (!pProg) throw std::exception("Error when creating `BaseGraphicsPass`. Can't create the `GraphicsProgram`");

        mpState = GraphicsState::create();
        if (!mpState) throw std::exception("Error when creating `BaseGraphicsPass`. Can't create the `GraphicsState`");
        mpState->setProgram(pProg);

        mpVars = GraphicsVars::create(pProg.get());
        if (!mpVars) throw std::exception("Error when creating `BaseGraphicsPass`. Can't create the `GraphicsVars`");
    }

    void BaseGraphicsPass::addDefine(const std::string& name, const std::string& value, bool updateVars)
    {
        mpState->getProgram()->addDefine(name, value);
        if (updateVars) mpVars = GraphicsVars::create(mpState->getProgram().get());
    }

    void BaseGraphicsPass::removeDefine(const std::string& name, bool updateVars)
    {
        mpState->getProgram()->removeDefine(name);
        if (updateVars) mpVars = GraphicsVars::create(mpState->getProgram().get());
    }

    void BaseGraphicsPass::setVars(const GraphicsVars::SharedPtr& pVars)
    {
        mpVars = pVars ? pVars : GraphicsVars::create(mpState->getProgram().get());
    }
}
